Much of what happens in Washington over the next two years will hinge on the 2026 midterms. Control of Congress is at stake, and the results will shape both President Donald Trump’s agenda and lawmakers’ legislative priorities. With several races becoming more competitive, exactly what that balance of power will look like remains unsettled.

Recent developments have generally moved in Democrats’ favor. They’ve gained ground in a number of House and Senate races, including some in traditionally Republican territory. Those shifts come against a challenging national backdrop for Republicans: Trump’s approval rating recently fell to 31%,¹ while Democrats have maintained an advantage in generic congressional ballot polling.

But national trends only tell part of the story. Individual races, local dynamics, and voter turnout will ultimately determine whether Democrats’ recent gains translate into a shift in control

A Competitive House Map Puts Control in Play

Democrats need a net gain of just three seats to take control of the House, and their opportunities have been expanding. Recent race ratings show Republicans defending competitive districts and open seats in traditionally Republican territory.

The movement isn’t limited to the usual battlegrounds, though. Several districts that backed Trump by double digits in 2024 have become more competitive, while a growing number of Republican-held open seats don’t have the advantage of an incumbent. That expands Democrats’ path to a House majority, but it doesn’t guarantee a blue wave. Republicans still benefit from the current congressional map, while candidate quality, local dynamics, and turnout could determine how far the pendulum swings.

There’s plenty of historical precedent for significant midterm losses. Republicans lost 41 House seats under Trump in 2018, while Democrats lost 63 during President Barack Obama’s first midterm in 2010 (FIGURE 1). But the comparison only goes so far. Increased polarization and redistricting have made today’s House map less susceptible to dramatic swings, potentially putting a ceiling on Democratic gains even in a more favorable national environment.

Several States Could Tip the Balance in the Senate

The fight for the Senate has also tightened. Republicans hold a 53–47 majority, leaving Democrats needing a net gain of four seats to take control. With competitive races stretching across an unusually broad map, the chamber is firmly in play.

Texas has emerged as one of the cycle’s most competitive and closely watched races, with Democrat James Talarico and Republican Ken Paxton essentially neck and neck. But Democrats’ opportunities extend beyond Texas. Alaska, Maine, and Ohio are among the states with tightly contested races, giving Democrats several potential pickup opportunities.

The broader map is also forcing Republicans to defend territory that would normally attract less attention. Races in states such as Kansas and Iowa have become increasingly competitive, while New Hampshire has moved toward Democrats. Even Mississippi has drawn additional Republican attention late in the race. Taken together, those developments suggest neither party can afford to focus solely on the traditional battlegrounds.

Democrats still have work to do to gain the four seats they need, and Republicans have a clear path to retaining control. But with more races in play, the battle for the Senate has expanded well beyond where it began.